System of arch-rib floor construction



E. L. MAYBERRY.

SYSTEM OF ARCH RIB FLOOR CONSTRUCTION.

APPLICATION mu) DEC. 22. I915.

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' EDWARD L. MAYBERRY, or LOS ANGELES, CALIFORNIA. I

SYSTEMI OF ARCH- 31B FLOOR CON STRUGTION.

Specification of Letters Patent.

Patented Sept. 27, 1921.

Application filed December 22, 1915. Serial No. 68,187.

To all whom it may concern:

Be it known that I, EDWARD L. MAYBERRY, a citizen of the United States, residing at Los Angeles, in the county of Los. Angeles and State of California, have invented a new and useful System of Arch-Rib Floor Construction, of which the following is a specification. g

This invention relates to the construction of concrete floor systems having series'of arches, and an object of the invention is to produce a mold or form which can be erected and taken downin minimum time.

Other objects and advantages may appear in the subjoined detailed description.

The accompanying drawings illustrate the invention Figure 1 is a vertical section of a fragment of floor system and form constructed in accordance with this invention. 7

Fig. 2 is a perspective view of a portion of Fig. 1, the flexible sofiitformplate of only one of the arches being shown.

Fig. 3 is a vertical section on. line indicated by a2 -w Fig. 1.

There are provided shoring timbers or posts 1 having their lower ends supported on whatever supporting structure is available and having their upper ends in engagement with the under faces of main beams or girders 2. The main beams 2 support on their upper faces transversely extending impost beams 3 which may be solid and which constitute the bottom form members for the rib portions 4 of the arch rib floor system 5. The open side of the channeled beams is on top. Supported by and between adjacent transverse beams 3 are flexible soilit form plates 6 having their opposite ends d etachably connected to the impost beams 23,

vand for this purpose said ends may be in serted between the sides of the impost beams 3 and clamping strips 7 as in Fig. 1, said strips being held by bolts 8 passing therethrough and through said impost beams.

The soiiit form plates 6 are longer than the spaces between adjacent impost beams 3 so as to arch or curve above the level of the horizontal molding face 0; of the impost beams 3, and said plates are each formed of one or more thin sheet metal plates which may have their surfaces plain as in Fig. 4 or may have portions of their molding surfaces in relief or intaglio as, for example, provided with depressions and projections 11, 12 forming corrugations as in Figs. 1 and 2. By corrugating the plates they may be made of thinner stock for a given strength than if they are uncorrugated, and the completed sofiit of the arch will thus-be molded with cor ugations or projections and depressions corresponding to the depressions and projections 11, 12of the soilit form plates. Each soilit plate 6 may be of sufficient size so that each floor arch 13 will be molded on a single plate or, as shown, each plate may be formedby a number of sections having abutting edges, andsaid sections may each comprise a single plate or sheet of standard or stock size. I At the joints 13 between the adjacent sections of the sofiit form plates 6, if said plates are in sections, and at any other desired points there are provided curved soflit-plate supports which, as shown, may be-formed in like sections '14, 15 fastened together by any suitable meansas, for instance, cleats l6 and nails 17. The soffit plate supports 14, 15 are provided with angular notches 18 to engage the clamping strips 7, as in Fig. 1, so as to be supported in position thereby.

At the ends of the soflit plates 6 there are provided curved end form plates 19 provided at their ends with angular notches 20 to fit the impost beams 8.

Supported on the impost beams 3 are form plates 21 adjacent the bottom margins of the end plates 19, and extending downward from the inner margins of said plates 21 are girder form side plates 22, there being at the lower margins of said side plates 22 bottom plates 23. The plates 22, 23 rest on transverse beams 24 engaged by shOIing timbers or posts 25.

The form as above described will be erected in place and then a suitable concrete mixture will be poured upon the impost beams 3, soilit plates 6 and girder plates 21, 23. When the concrete of the floor structure has stood the prescribed or desired length of time for hardening, the sofiit plates 6 will be detached and removed and then the other members of the form will be taken down and removed.

From the foregoing it is seen that the sofiit plates 6 form arches extending above the level of the molding face of the impost beams 3 and that the rib portions 4 may be made of relatively great depth so that a monolithic structure having relatively long and wide concrete arches can be constructed of sufiicient strength to withstand heavy live loads.

I am aware that it is not new to employ a flexible soffit form plate in combination with the metal beams forming permanent parts of the structure, but the novel combinations in the appended claims are new and are of advantage in the construction of a monolithic floor system for the reason that any depth of ribs relative to the depth of the arches at their crowns can readily be obtained.

If it is desired to make provision for suspending a ceiling from the floor construction, suitable anchors 26 of wire or equivalent may be inserted and clamped between some of the clamping strips 7 and their impost beams 3, as in Fig. 1.

In casting reinforced concrete structures, it is quite essential that the temporary form members be securely connected to one another so as to prevent yielding of the forms during the pouring operation and while the setting of the concrete is in progress, and this is especially true in the casting of floors. I secure the necessary rigidity of the floor forms by the particular construction, arrangement and combination of elements shown in the drawings, wherein the clamping strips 7 perform the two-fold function of firmly clam ing the side margins of the soflit form plates 6 between the strips and the impost beams 3, and taking the lateral thrust of the supports 14, 15. The greater the load imposed on the form plates 6, the

greater will be the lateral thrustof the supports 14, 15 against the clamping strips 7 which, consequently, hold the side margins of the sofiit form plates the more tightly and clamp strips, and clamp means cooperating with the bolts to clamp the marginal edges of the plates between the impost beams and the clamp strips.

2. In combination, impost beams, flexible metal plates forming arches extending above the level of the upper face of the impost beams, clampin strips extending along the impost beams, tie lower edges of the metal plates being inserted between the clamping strips and impost beams, soifit-plate supports having their ends resting on and thrusting laterally against the clamping strips and fitting the under side of the metal plates, means detachably fastening the clamping strips to the impost beams, and means detachably supporting the impost beams.

Signed at Los An eles, California.

EDWA D L. MAYBERRY. 

